 
 (defn extract-series
   "Transforms coll into a series map by using the values in the provided keymap.
+  There's no requirement to provide :x or :y (or any key at all, for that
+  matter), although that's common.
 
   Example: (extract-series {:x f, :y g, :bubble bubble} coll)
         == {:x (map f coll), :y (map g coll), :bubble (map bubble coll)}"


(defn spit
  "Spits the chart to the given filename. If no type is provided, the type is
  guessed by the"
  ([chart fname]
   (spit chart fname (guess-extension fname)))
  ([chart fname type]

       (not (nil? show-in-legend?)) (.setShowInLegend (boolean show-in-legend?))))))

(defn bubble-chart*
  "Returns a raw bubble chart. Bubble charts are hard to make right,
  so please see the tutorial for more information about how to create
  one. The render-styles page will give you information about styling
  options."
  ([series]
   (bubble-chart* series {}))
  ([series
